423622857 has 16 divisors (see below), whose sum is σ = 656104832. Its totient is φ = 238101120.

The previous prime is 423622757. The next prime is 423622861. The reversal of 423622857 is 758226324.

It is not a de Polignac number, because 423622857 - 2⁷ = 423622729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (423622357) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 164068 + ... + 166629.

It is an arithmetic number, because the mean of its divisors is an integer number (41006552).

Almost surely, 2^423622857 is an apocalyptic number.

It is an amenable number.

423622857 is a deficient number, since it is larger than the sum of its proper divisors (232481975).

423622857 is a wasteful number, since it uses less digits than its factorization.

423622857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330768.

The product of its digits is 161280, while the sum is 39.

The square root of 423622857 is about 20582.1004030201. The cubic root of 423622857 is about 751.0343399764.

The spelling of 423622857 in words is "four hundred twenty-three million, six hundred twenty-two thousand, eight hundred fifty-seven".